Pith Number

pith:KOCA6GJ4

pith:2020:KOCA6GJ4LWRH4IVWK6L4N5L475

not attested not anchored not stored refs pending

A note on the minimization of a Tikhonov functional with $\ell^1$-penalty

Fabian Hinterer, Ronny Ramlau, Simon Hubmer

arxiv:2001.02991 v2 · 2020-01-09 · math.NA · cs.NA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KOCA6GJ4LWRH4IVWK6L4N5L475}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T01:29:49.459466Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53840f193c5da27e22b65797c6f57cff6dee49a6cf4df2238b7171f3b664771c

Aliases

arxiv: 2001.02991 · arxiv_version: 2001.02991v2 · doi: 10.48550/arxiv.2001.02991 · pith_short_12: KOCA6GJ4LWRH · pith_short_16: KOCA6GJ4LWRH4IVW · pith_short_8: KOCA6GJ4

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/KOCA6GJ4LWRH4IVWK6L4N5L475 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 53840f193c5da27e22b65797c6f57cff6dee49a6cf4df2238b7171f3b664771c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df31754deb73bd505a243c05db635cbf30239a8570bf6e5519494d083af66c48",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2020-01-09T14:06:47Z",
    "title_canon_sha256": "b9ada429d84741910fc3749c594972f0bbcae84feefd4a96351726f5ee0eb30f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.02991",
    "kind": "arxiv",
    "version": 2
  }
}